A dead minke whale was found washed up on an Atlantic City beach May. While the discovery of graffiti sprayed on its carcass sparked outrage, officials say they discovered something else about the animal that’s even more disturbing.

“It did test positive for morbilli,” said Bob Schoelkopf, the founding director of the Marine Mammal Stranding Center.

“It’s making us concerned that there may be something going on,” Schoelkopf said.

Schoelkopf says officials are currently awaiting test results on two bottlenose dolphins that recently washed up dead.

After a large dolphin die-off in the late 80s, there was no re-occurrence of the measles-like virus responsible for their deaths the following year. Experts say that may not be the case this summer.

“Our concern is that if it comes in contact with a large number of either common dolphins or the off-shore bottlenose, this could be even worse than last year,” Schoelkopf said. “We don’t know what’s going to happen.”

If you notice a dead animal on the beach, call the Marine Mammal Stranding Center immediately.